She was unmarked, unknown to any of the world's intelligence organizations, including Mossad.
It is being held ransom by an unknown organization that demands $100,000 be donated to a free school for the manuscript's return.
A man who has merged with a dog and is part of some unknown evil organization.
Your secondary fantasy concerning an unknown organization you call Medusa.
The buyer was identified as the United Churches of Florida, an unknown organization.
It was recorded that three Indian actors who were considered to play the title part received threats from unknown organisations.
However, the Harpers were framed by another, unknown, secret organization.
Authorities have yet to make an arrest, but a previously unknown terrorist organization has claimed responsibility.
Those clients had reasons to be thankful for the existence of this rather unknown organisation.
A previously unknown organization called "the army of Allah's supporters" claimed responsibility for the foiled attack.